Add version format validation and user prompt in UseCommand

[j-j-gajjar]

Implemented a check in the UseCommand to prompt the user to confirm or adjust the Flutter version format if it's incomplete or invalid. This ensures that the version matches the expected format (e.g., "3.27.0") before proceeding with further operations.

Example:

1. The user enters the following command:

   fvm use 3
   

2. The program checks the version format and prompts:

   You specified version 3. Did you mean 3.0.0? (y/n)
   

3. If the user confirms with y, the version is updated to 3.0.0, and the process continues.

4. If the user types n, the program will ask them to provide a valid version format (e.g., 3.27.0).

5. If the version format is invalid (e.g., 3.27), the program will show an error:

   Invalid version format "3.27". Please specify a version like "3.27.0".
   

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